update PHP route guide README as per feedback

php/route_guide/README.md

@@ -8,14 +8,16 @@ This tutorial provides a basic PHP programmer's introduction to working with gRP
 
 It assumes a passing familiarity with [protocol buffers](https://developers.google.com/protocol-buffers/docs/overview). Note that the example in this tutorial uses the proto2 version of the protocol buffers language.
 
+Also note that currently you can only create clients in PHP for gRPC services - you can find out how to create gRPC servers in our other tutorials, e.g. [Node.js](https://github.com/grpc/grpc-common/tree/master/node/route_guide).
+
 This isn't a comprehensive guide to using gRPC in PHP: more reference documentation is coming soon.
 
 - [Why use gRPC?](#why-grpc)
 - [Example code and setup](#setup)
+- [Try it out!](#try)
 - [Defining the service](#proto)
 - [Generating client code](#protoc)
 - [Creating the client](#client)
-- [Try it out!](#try)
 
 
 <a name="why-grpc"></a>
@@ -41,6 +43,25 @@ Our example is a simple route mapping application that lets clients get informat
 
 You also should have the relevant tools installed to generate the client interface code (and a server in another language, for testing). You can obtain the latter by following [these setup instructions](https://github.com/grpc/homebrew-grpc).
 
+
+<a name="try"></a>
+## Try it out!
+
+To try the sample app, we need a gRPC server running locally. Let's compile and run, for example, the Node.js server in this repository:
+
+```shell
+$ cd ../../node
+$ npm install
+$ cd route_guide
+$ nodejs ./route_guide_server.js --db_path=route_guide_db.json
+```
+
+Run the PHP client (in a different terminal):
+
+```shell
+$ ./run_route_guide_client.sh
+```
+
 The next sections guide you step-by-step through how this proto service is defined, how to generate a client library from it, and how to create a client stub that uses that library.
 
 
@@ -239,21 +260,3 @@ To read messages from the server:
 ```
 
 Each side will always get the other's messages in the order they were written, both the client and server can read and write in any order — the streams operate completely independently.
-
-<a name="try"></a>
-## Try it out!
-
-To try the sample app, we need a gRPC server running locally. Let's compile and run, for example, the Node.js server in this repository:
-
-```shell
-$ cd ../../node
-$ npm install
-$ cd route_guide
-$ nodejs ./route_guide_server.js --db_path=route_guide_db.json
-```
-
-Run the PHP client (in a different terminal):
-
-```shell
-$ ./run_route_guide_client.sh
-```